@article{TAC_2008_21_a2,
     author = {Francis Borceux and Marino Gran and Sandra Mantovani},
     title = {Protolocalisations of exact {Mal'cev} categories},
     journal = {Theory and applications of categories},
     pages = {37--60},
     publisher = {mathdoc},
     volume = {21},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2008_21_a2/}
}